This is interesting. I've always been unable to read properly under fluorescent lights compared to normal ones. I've been told this is due to my dyslexia. I did some research into fluorescent light sensitivity and photophobia (basically the lights flickers too much and inhibit reading ability), and according to this website (http://www.allaboutvision.com/conditions/lightsensitive.htm) mercury poisoning can affect it. It doesn't mention anything about fluorescent lights emitting mercury, just the flicker and the sufferer’s sensitivity to it...